I use the flip image feature occasionally but I noticed an unwanted side effect. An image that had been scaled to 34.1% of normal size proportionally changed to 34.1% x -34.2% after the transformation. It doesn't have any real visual effect, but it does set off false alarms in my preflight for a non-proportionally scaled image.
It's always nice to preflight a document and see zero errors, as opposed to seeing a bunch of error that are (problably, maybe, hopefully) harmless.
Any way to flip an image without triggering these false alarms? I could go into Photoshop and make a new file, but the resulting file clutter isn't a perfect solution either.